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Google launches its first in-house map mashup, an earth-friendly tour of 5 cities in the United States.

The mashup points out environmentally-friendly destinations and services in Las Vegas, Los Angeles, New York, Orlando or San Francisco.

Listings include the Las Vegas Natural History Museum and the Go Raw Cafe in Las Vegas, the Tree People park and EcoLimo in Los Angeles, the Skyscraper Museum and Central Park in New York, the Forever Florida nature preserve and Horse World Riding Stables in Orlando and, in San Francisco the Red Victorian Bed and Breakfast and the Exploratorium.

The maps include embedded video of the handful of earth-friendly suggestions within each city. Right now the mashup's pretty limited to those 5 cities, but Google suggests searching for "environmentally friendly hotels" instead of just "hotels" when researching trips to any city. All in all, a useful mashup and a brilliant marketing move by the big G to cast itself as "green."